1052666691 has 32 divisors (see below), whose sum is σ = 1494761472. Its totient is φ = 657528960.

The previous prime is 1052666663. The next prime is 1052666701. The reversal of 1052666691 is 1966662501.

It is not a de Polignac number, because 1052666691 - 2⁶ = 1052666627 is a prime.

It is a super-2 number, since 2×1052666691² = 2216214324681778962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1052666651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1611721 + ... + 1612373.

It is an arithmetic number, because the mean of its divisors is an integer number (46711296).

Almost surely, 2^1052666691 is an apocalyptic number.

1052666691 is a deficient number, since it is larger than the sum of its proper divisors (442094781).

1052666691 is a wasteful number, since it uses less digits than its factorization.

1052666691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 1052666691 is about 32444.8253347125. The cubic root of 1052666691 is about 1017.2560786234.

The spelling of 1052666691 in words is "one billion, fifty-two million, six hundred sixty-six thousand, six hundred ninety-one".